AWS Certified Welding Inspector (CWI)
Examination Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of a welding procedure specification
(WPS)?
A. To detail inspection methods
B. To provide instructions for making a weld
C. To list required safety equipment
D. To define the dimensions of a structure
Rationale: The WPS provides step-by-step instructions for welders to
ensure the weld meets quality and mechanical requirements.
2. Which of the following is a common non-destructive testing (NDT)
method used for weld inspection?
, A. Tensile testing
B. Radiographic testing (RT)
C. Bend testing
D. Hardness testing
Rationale: RT allows internal defects to be detected without
destroying the weld, making it a key NDT method.
3. What does “preheat” refer to in welding?
A. Heating the filler metal before use
B. Heating the base metal before welding
C. Heating the electrode
D. Heating the shielding gas
Rationale: Preheating reduces thermal stress and prevents cracking
in the weld area.
4. Which type of welding joint is formed when two pieces are placed at
an angle to each other?
A. Butt joint
B. Lap joint
C. Fillet joint
D. Edge joint
Rationale: Fillet joints are created by welding at the intersection of
two surfaces forming a right angle.
5. In the AWS CWI exam, what is the purpose of performing a bend test?
A. Measure hardness
, B. Evaluate ductility and soundness of a weld
C. Test tensile strength
D. Check weld size
Rationale: Bend tests show the ability of a weld to withstand plastic
deformation without cracking.
6. Which type of welding electrode is coated to stabilize the arc and
provide shielding?
A. Bare electrode
B. Flux-cored wire
C. Shielded metal arc welding (SMAW) electrode
D. TIG torch
Rationale: SMAW electrodes have flux coating that stabilizes the arc
and protects the weld pool.
7. What is the main cause of porosity in welds?
A. Excessive heat
B. Incorrect electrode angle
C. Contaminants such as moisture or oil
D. Low welding current
Rationale: Moisture, rust, oil, or paint can release gases during
welding, causing porosity.
8. Which AWS specification outlines standards for carbon and low-alloy
steel welding?
A. AWS D1.2
, B. AWS D1.3
C. AWS D1.1
D. AWS D17.1
Rationale: AWS D1.1 is the structural steel welding code for carbon
and low-alloy steels.
9. During visual inspection, which defect is characterized by a linear
depression in the weld surface?
A. Overlap
B. Porosity
C. Undercut
D. Slag inclusion
Rationale: An undercut is a groove at the weld toe that weakens the
weld.
10. Which welding position is considered the most difficult?
A. Flat
B. Horizontal
C. Overhead
D. Vertical
Rationale: Overhead welding requires the welder to work against
gravity, increasing difficulty and risk of defects.
11. What is the main purpose of post-weld heat treatment (PWHT)?
A. Increase hardness
B. Reduce weld size
Examination Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a welding procedure specification
(WPS)?
A. To detail inspection methods
B. To provide instructions for making a weld
C. To list required safety equipment
D. To define the dimensions of a structure
Rationale: The WPS provides step-by-step instructions for welders to
ensure the weld meets quality and mechanical requirements.
2. Which of the following is a common non-destructive testing (NDT)
method used for weld inspection?
, A. Tensile testing
B. Radiographic testing (RT)
C. Bend testing
D. Hardness testing
Rationale: RT allows internal defects to be detected without
destroying the weld, making it a key NDT method.
3. What does “preheat” refer to in welding?
A. Heating the filler metal before use
B. Heating the base metal before welding
C. Heating the electrode
D. Heating the shielding gas
Rationale: Preheating reduces thermal stress and prevents cracking
in the weld area.
4. Which type of welding joint is formed when two pieces are placed at
an angle to each other?
A. Butt joint
B. Lap joint
C. Fillet joint
D. Edge joint
Rationale: Fillet joints are created by welding at the intersection of
two surfaces forming a right angle.
5. In the AWS CWI exam, what is the purpose of performing a bend test?
A. Measure hardness
, B. Evaluate ductility and soundness of a weld
C. Test tensile strength
D. Check weld size
Rationale: Bend tests show the ability of a weld to withstand plastic
deformation without cracking.
6. Which type of welding electrode is coated to stabilize the arc and
provide shielding?
A. Bare electrode
B. Flux-cored wire
C. Shielded metal arc welding (SMAW) electrode
D. TIG torch
Rationale: SMAW electrodes have flux coating that stabilizes the arc
and protects the weld pool.
7. What is the main cause of porosity in welds?
A. Excessive heat
B. Incorrect electrode angle
C. Contaminants such as moisture or oil
D. Low welding current
Rationale: Moisture, rust, oil, or paint can release gases during
welding, causing porosity.
8. Which AWS specification outlines standards for carbon and low-alloy
steel welding?
A. AWS D1.2
, B. AWS D1.3
C. AWS D1.1
D. AWS D17.1
Rationale: AWS D1.1 is the structural steel welding code for carbon
and low-alloy steels.
9. During visual inspection, which defect is characterized by a linear
depression in the weld surface?
A. Overlap
B. Porosity
C. Undercut
D. Slag inclusion
Rationale: An undercut is a groove at the weld toe that weakens the
weld.
10. Which welding position is considered the most difficult?
A. Flat
B. Horizontal
C. Overhead
D. Vertical
Rationale: Overhead welding requires the welder to work against
gravity, increasing difficulty and risk of defects.
11. What is the main purpose of post-weld heat treatment (PWHT)?
A. Increase hardness
B. Reduce weld size
